. "XCOR/ULA liquid-hydrogen, upper-stage engine development project" . . "now canceled" . . "1999" . . "Chapter 7 Bankruptcy" . . "XCOR_Aerospace#XCOR.2FULA_liquid-hydrogen.2C_upper-stage_engine_development_project" . . . . . . . . "XCOR_Aerospace#Projects" . . . . "XCOR/ULA aluminum alloy nozzle engine" . . "XCOR" . . . "XCOR Aerospace" . . "Nonburnite" . . "XCOR Aerospace" . . . .